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Global Earth Observing System-of-Systems (GEOSS)Architectural Framework
Doug Nebert
FGDC, U.S. Geological Survey
February 2008
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Intergovernmental Group on Earth Observations (GEO)
• 72 Member countries plus the European Commission • 52 Participating Organizations • GEO Secretariat (Geneva)• Committees:
– Architecture and Data– Capacity Building– Science and Technology– User Interface
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What is GEOSS?Global Earth Observing System of Systems
• GEOSS is a distributed system of systems built on current international cooperation among existing Earth observing and data management systems – in situ and remote sensors and systems
• GEOSS enables the collection and distribution of accurate, reliable Earth Observation data, information, products, and services in an end-to-end process
• GEOSS recognizes and promotes the deployment of geospatial standards to enable broad access and interoperability among diverse systems – engages the space and environment community to adopt and expand Spatial Data Infrastructures
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GEOSS infrastructure elements
• Components– Systems, projects, programs, initiatives
• Services– Web services, brokered services, linked with information
content for delivery
• Registries– “Yellow-pages” directories of common GEOSS resources
• Clearinghouse– Cross-GEOSS search capability for services and data
• Web Portals– User interface to access all GEO resources, search GEOSS
Registries and Clearinghouse
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GEOSS Registries as common infrastructure
• GEOSS Components Registry– Systems, initiatives, programs and their operators
• GEOSS Services Registry– Web service interfaces and websites with links to all
relevant associated standards or practices• GEOSS Standards and Interoperability Registry
– Service interface standards, data formats, schemas, and other standards
– Non-standard community practices can be registered as “special arrangements”
• Best Practices Registry/Wiki – under development• Earth Observation (User) Requirements Registry – under
development
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GEOSS registry system objectives
• To register components and have them approved by the GEO Secretariat,
• To register services and associate them with GEOSS-recognized standards – and special arrangements for implementations using non-recognized approaches,
• To register special arrangements and GEOSS-recognized standards. – Taxonomy of standards types is used to assist in the
discovery and classification of GEOSS service implementations.
• Best practices (wiki) and EO User Requirements• On-line access
– http://geossregistries.info/– http://seabass.ieee.org/groups/geoss/
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GEOSS workflow
GEOSSComponent,
Service registry
Standards,Special
ArrangementsRegistries
references
Web Portal
searches
Offerors
contribute
CommunityResourcesaccesses
GEOSSClearinghouse
Catalogues
User
accesses
get catalogueservices
accesses
searches
invokes
1
2
34
56
7
8
ComponentSystem
Service(s)
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GEOSS RegistriesThe Registries store organizational, system, and service information in the context of existing standards and practices within the GEO community.
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Registering items
• GEO members and participating organizations are invited to register their offers for GEOSS participants to find
• Components and Service Registry created and hosted at George Mason University– Registered services include data access services,
WMS, metadata catalogs, order, data transformation, etc.
– Services should be standards-based but may alternately reference community practices or ad hoc standards, known as “special arrangements”
• Standards registry hosted by IEEE to provide official list of registered standards and special arrangements
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Registration Process
EnterIndividual
Info
GEOAffiliation
EnterComponent
Info
Link to SBAs
EnterService
Info
Link to Standards
http://geossregistries.info
Done
Data format, metadata,Protocol, schema, Service specification
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GEOSS Clearinghouse
• Clearinghouse is a broker to Community Catalogues• Searches GEOSS Service Registry to identify
services that can be searched• Community Catalogues may either be “harvested” in
advance or “searched” at the time of a user query • Searches received from GEO Web Portal,
Community Portals or any other external application acting as a catalog client
• Brief or full responses are marshaled and returned to requesting client as XML
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Web Portal, Client, DS Client, Desktop application
2
1
4
5 3
Registercatalogs asservices
GEOSS Clearinghouse
OGC CSW 2.0.2
6 Collate response
7
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GEO Web Site
Client Tier
Business Process Tier
Access Tier
GEOSSWeb
Portal
GEOSSRegistries
Services
Components
Standards
DirectBroadcast
OtherServices
DataAccess
Services
ModelAccess
Services
CommunityPortals
Decision-Support Applications
RequirementsCommunityCatalogues
PortrayalServices
WorkflowManagement
ProcessingServices
OtherServices
GEOSSClearinghouse
CSW/ISO23950
CSW/ISO23950
Get list
Register
CSW/SRU/UDDI
SensorAccess
Services
GEOSS Architecture – Engineering Viewpoint
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Initial Operating Capability
• An Initial Operating Capability (IOC) was established for GEOSS in November 2007 largely as a result of a GEOSS Architecture Implementation Pilot, Phase 1. Several demonstrations portray the IOC functionality. – Users can access the GEOSS IOC functionality
through the GEOSS Web Portal Candidates, Community Portals and Decision Support Clients.
– Providers can register their services as part of the IOC at the GEOSS registry system.
– Developers can view a description of the GEOSS IOC architecture through the website: http://www.ogcnetwork.net/GEOSS_IOC
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GEOSSComponent Registry
Service Registry
GEOSSStandards and
Special ArrangementsRegistry
references
GEO Portallinks
GEOSSClearinghouse
CataloguesServices
User
accesses
accesses
Accesses allRegistered Community Resources
searches
GEOSS Common Infrastructure
GEONETCast
Websites/Webportals
Catalogues
Registered components External resources
Websites/Webportals
GEO Web Sitelinks
Links to Other Community Resources
Register
Documents
RSS
CatalogQueryClients
GEOSS Common Infrastructure
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For more information, contact:
Douglas Nebert
U.S. Federal Geographic Data Committee
+1 703 648 4151